Improved machine for cutting key-seats



i UNITED STATES PATENT OFFICE.-

J. O. MORGAN, OF ALLIANCE, OHIO, ASSIGNOR TO WILLIAM A. NIXON AND J. s. EvEanAnn,

OF SAME PLACE.

Specitication forming part of Letters Patent No. 46,758, dated March 7, 1865.

To all whom it may concern:

Be it known that I, J. O. MORGAN, of Alliance, in the county of Stark and State of Ohio, have invented a new and Improved Machine for Cutting Keyseats; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, formingpart ot' this specification, in which- Figure l represents a vertical section of this invention, the line x a, Fig. 2,'indicating the plane of section. Fig. 2 is a plan or top view of the same.

Similar letters of reference indicate corresponding parts.

This invention consists in a machine provided with a mandrel, which may be fixed or movable, and on which the piece in which the key-seat is to be cut can be chucked. This mandrel is slotted, so as to allow the saw to pass through it, and the saw is adjusted at the requisite angle for cutting by a guide or set-screws which hold the lower part of the same in position. The feeding arrangement is composed of a screw with a dog hinged to a knuckle in such a manner that the saw is thrown forward when cutting and allowed to drop back when not cutting.

A represents a standard which rises from a foot, B, and which may be made of metal or any other suitable material. The upper end of this standard bears a boss or socket, C, which projects therefrom in a lateral direction, as clearly shown in Fig. 2 ot' the drawings. This socket is bored out large enough to receive the lower end ofthe mandrel D,on which the piece into which the keyseat is to be out is chucked. In order to adapt the machine to different piece of work, the mandrel must be made removable, so that it can be taken out and replaced by another, according to the piece of work in which the key-seat is to be out.

The mandrel D is slotted in a longitudinal direction to admit the saw E, which serves. to cut the key-seat, and which is provided with one or more cutters, as may be desirable. The shank of the saw is set to the desired inclination or direction by means of two setscrews or guides, a a', which pass through the sides of the socket G near its lower edge, and said shank connects by a pitman, F, with the eccentric wrist-pin b, which projects from vthe disk G, that is mounted on the end of the driving-shaft H. By imparting to this shaft a rotary motion a reciprocating motion is imparted to the saw and the cutting is effected.

The piece of work in vwhich the key-seat is to be eut is held in position by the chuck I, which is clamped to the mandrel D by means of the set-screw c. The chuck I is composed of a sleevefd, which lits loosely over the mandrel, andv a stirrup, e, which straddles the sleeve, is drawn up against the surface of the mandrel by means of the set-screw c. The stirrup is slotted, and bears on the mandrel on both sides of the slot in the same manner, so that it will not interfere with the action of the saw. It must be remarked, however, that the chuck might be secured to the mandrel in various different ways, and -I do not wish to confin myself to any particular method of accomplishing this object, but I reserve the right to change the same as circumstances may dictate.

The feeding mechanism is composed of a screw, f, which is tapped in the end of a tubular projection, g, extending from that side of the ,l sleeve d opposite the stirrup e. The screw f bears on a slide, h, with which it is connected by a pin catching in a collar in such a manner that said screw can be turned independent ot' the slide,but the slide is compelled to follow the screw in a longitudinal direction, or to move in and out as the screw rotates. The slide h carries the knuckle i which has its bearing in a spherical socket in the sleeve and is held down by a. thin spring, g. The outer end of the knuckle carries the shoe k, and it is connected thereto by a ball and socketor any other suitable joint, as shown in Fig. l of the drawings.

By turning the feed screw f in the proper direction the shoe lo is brought to bear on the back of the saw, and if the saw moves forward or in the direction in which it cuts, the knuckle i strikes a shoulder, l, on the slide, and the saw is held upto the work, but it' the saw moves back or in the direction in which it does not cut, the knuckle turns up against the spring j in the direction of the arrow markednear it in Fig. l, and the saw drops 3. The set-screws or guides a a', applied in combination with the socket O, mandrel D, and saw E, substantially as and for the purpose set forth.

el. The knuckle and shoe lr, applied in combination with the slide h,t`eedscrew f, and saw E, substantially as and for the purpose doscribed.

J. C. MORGAN.

- Witnesses J oHN W. LYDER, WILLIAM P. RICE. 

